Sand-handling truck



June 9, 1931. E. o. BEARDSLEY ET AL SAND HANDLING- TRUCK 5 Sheets-Sheet1 Original Filed Dec. 8, 1924 June 9, 1931. E. o. BEARDSLEY ET AL ,7

SAND HANDLING TRUCK Original Filed flee. 8, 1924' 5 Sheets-Sheet 2 June9, 1931- E. 'o. BEARDSLEY ET AL SAND HANDLING TRUCK Original Filed Dec.8, 1924 5 Sheets-Sheet 3 June 9,, 1931. E. o. BEARDSLEY ET AL 71,809,796

SAND HANDLING TRUCK 5 Sheets-Sheet 4 Original Filed Dec. 8, 1924 J1me1931. E. o. BEARDSLEY ET AL 1,809,795

SAND HANDLING TRUCK 5 Sheeis-Sheet 5 Original Filed Dec. 8, 1924 m mmWWIIIIIII/I/I/IIIIIII/I/A 2067? 0715' M0. v2rr- P? f 7,, W

The invention relates to trucks for hanm ted Jun'e 9,- 1931" 1 UNITEDSTATES m cs ELMER O. AND WALTER I. PIPER, OI ABSIGROBS'EO THE BEABDBLEYG: ILLINOIS Original application filed December 8, 1984, Serial No.764,487. Divided and this 11, 1926. Serial No. 80,447.

dling sand in foundries. Y The primary object of the invention istoprovide a truckwhichris equipped with new and improved sand hoistingapparatus.

Other objectsof the invention will be apparent from a consideration ofthe following detailed description.

This application is a division of the application filed by us, December8, 1924 and.

serially numbered 754,487.

The invention consists in'the several novel features hereinafter setforth and more particularl defined by the claims at the conclusionereof.

In the drawings which accompany and form a part of this 'specificationordisclosure andin which like numerals of referencedenote correspondingparts throughout the several views: Fig.1 is a side elevational viewexhibiting a truck which embodies the invention and has mountedthereon'a moulding machine into which sand may bedelivered from areservoir on the truck. Fig. 2 is a plan. Fig. 2 is a detail sectionalview of a portion of the endless conveyor which forms the bottom of thereservoir. Fig. 3 is a longitudinal section. Fig. 4 is an enlargedsection taken on the line 4-4 of Fi 3. Fig.

5 is an end view of the parts w ich are shown in Fig. 4. Fig. 6 is anenlargedsection taken on the line 6-6 of Fig. 1. Fig. 7 is a sectiontaken on the line 7-7 of Fig 6. Fig. 8 is an enlarged section taken onthe line 88 of Fig. 1. Fig. 9 is a section taken onthe line 99 of Fig.8. 1

The truck which forms the subject matter of the invention is primarilyfor use in con nection with a foundry and is adapted to run upon anarrow track which is formed by rails 15 that are laid on the foundryfloor. This truck is provided with a pair of front traction wheels 16and a pair of rear wheels 17 which are adapted to run on the rails. Theframework of the truck comprises a cast metal housing 18, through whichthe axle 19 for the traction-wheels 16 extends; a pair of sills 20whichare formed of channel beams and are secured to the housing at 21sothat they ex tend rearwardly therefrom; an end frameor SAND-HANDLINGzrnucz,

bracket 22 which is'fixedto the sills 20 and carries studs 23 for thecarrying wheels 17;

and a tubular reach 24, which has itsfront end fixed ina socket 25 onaplate 26 which:

55 its rear end fixed in a depending lug 28 1 I is bolted at 27 to therear of housing 18, and

on bracket 22 by a clamping member 29. The

housing 18 forms an enclosure for the proi pelling mechanism' for thetruck and the sand feeding mechanism.

application iled January PIPER oomrm, or calme -rumors,a-conroaa'rrorror v I ed longitudinally and is downwar y convergent, isadapted to retain a load of sand. The

' sides of reservoir 30 are fixed to the sills- 20 of the truck by meansof angle bars 31 which are riveted to the reservoir, and

bolted to the top flanges of the sills. The to of this reservoir isopen, so that it can be fil ed from an over-head sand delivery systemthis reservoir is formed by means of an end-1 or in any othersuitableway. The bottom of less conveyor 33 which is adapted to feed thesand forwardly through a discharge opening 34 adjacent the bottom and inthe front wall of the reservoir. This conveyor consistsof 1 an endlessseries of slats 35 which are adapted i i to overlap one another to forma closure; a pair of endless link belts 36, to which lugs 37,

fixedto the slats 35, are ivoted; sprocketwheels 38 for said belts, xedto aJshaft 39,

which is journalled in bearings 40 fixed to the conveyor taut.

The discharge opening 34 .is normally closed by a curved gate 45 whichis vertically -movable to serveas a valve, whereby the height of thedischarge opening may be va-' ried to regulate the quantity of sand discharged from the reservoir. supported by a pair of arms 46 which arepivoted to the reservoir sides at 47 so the gate can swing upwardlyordownwardly. .These arms are preferably hung sothat ordinary pieces ofscrap, which are larger than the opening, will force their way throughSaid gate is the opening by lifting the gate sothat theyv will notobstructthe discharge opening and 1 so Areservoir 30, which is preferablelongatthus interfere with the regulated delivery of the sand. Mechanismis provided to raise and lower gate and consists of a crank 48journalled in a bracket 49 and carrying a worm 50 to operate a gear 51fixed to rotate with a drum 52 and a flexible element, such as a cable53, wound around the drum and attached at its lower end to the gate.Drum 52 is carried by the shaft 54 which is supported in brackets 55 and56 attached to the front of the reservoir 30. Cable 53, being flexible,permits the gate 45 to be forcibly lifted by scrap on the conveyor 33and also permits the gate to fall by gravity to its desired positionafter the scrap has passed through the discharge opening. The conveyor33 is operated to feed the sand step-by-step through the dischargeopening by means of a ratchet wheel 57 fixed to one end of the shaft 39,and a pawl 58 on a rocker arm 59 which is pivoted on shaft 39 and isoscillated by a link 60. The latter is pivoted to said arm and to awrist-pin 61 on the outer end of a shaft 61 which is driven bygearing-hereinafter described. This construction exemplifies a reservoirwhich is adapted to contain a load of sand and which is provided with anendless conveyor bottom for discharging the sand in regulated quantityfrom one end thereof.

The conveyor belt 33 discharges the sand into a screening or riddlingdevice 62 which is disposed under the front end of said belt. Thisdevice consists of a box 63, containing a screen 64; and an inclinedbottom 65. The box has an opening at one end adapted to discharge thescreened sand into a pocket 66 formed in the housing 18. The riddlingdevice is of the vibratory type, being sustained at its front endby apair of vertically extending resilient strips 67 which have their upperends attached to the box 63 and their lower endsto the bracket 26, and apair of resilent strips 68 at the rear of box 63. Strips 68 have theirupper ends attached to an angle iron 69 which is riveted to the box 63and their lower ends secured at 70 to a bracket 71 which is recessed tofit around a portion of the tubular reach 24 and is clamped thereto by aU-bolt 72. The screening device is vibrated rapidly by wrist-pins 73 onthe ends of a. shaft 7 4and resilient rods 7 3*.

An electric motor 90 is mounted in a pocket 91 in housing 18. It issuitably coupled to drive a coaxial shaft 92, which 1s journalled in abearing 93 in the housing. A pinion 94 on one end of shaft 92 mesheswith a gear 95 which is keyed to the shaft 74. The m0- tor 90 and thegearing that is associated therewith drive the shaft 74 to operate thewrist ins 73 which vibrate the riddle orscreenmg device. A shield 96covers the outer end of electric motor 90. Pinion 94 and gear 95 arelocated in a chamber 97 on the outside of one of the side walls of thehousing 18 and the outer side of this chamber is formed by a removableplate 98. This chamber is adapted to contain a lubricant to keep thegearing properly lubricated. The housing 18 is formed, as at 99, toenclose the inner side of the motor 90, so that it will not be exposedto sand in the pocket 66. This construction exemplifies a screeningdevice which is located to receive sand from the bottom of the reservoirand for delivering the sifted sand into a pocket.

An elevator is mounted on the truck for lifting the sand from the pocketand delivering it to a hopper 85 from which it may be discharged to anydesired place or projected into the conveying mechanism of a mouldingmachine which may be mounted on the truck and of the same constructionas shown and described in our application filed December 1, 1924, andserially numbered 753,095, and our application (Serial No. 754,487) ofwhich this is a division. This elevator comprises a sprocket wheel 75,which is secured to the shaft 61; a chain 76 equipped with sand buckets77; an overhead sprocket 7 8 on a shaft 79, which is mounted in levers80 which are fulcrumed at 81 on the upper end of a column 82, which isbolted, as at 83, to the top of housing 18. This column is hollow andthe descending reach of the chain and buckets pass therethrough.Sprocket 75 is disposed in the pocket 66, so that the buckets, as theypass around said sprocket, will dip into the sand from the screeningdevice 63 and elevate it. At each side of the pocket 66, angularlyextending blades 84 are fixed to shaft 61 to agitate the sand andprevent it from becoming packed in the pocket, so that it will movefreely into the buckets 77. As the buckets 77 pass around sprocket 78,they discharge the sand forwardly over the top of the column 82 and intothe hopper 85. The elevator chain 76 is kept taut by springs 86 whichare connected to levers 80 and to cables 87. One end of each cable 87 iswound around the shaft of a ratchet wheel 88 which is mounted on oneside of the column 82 and is held bya pawl 89, so that the shaft may beturned to'wind up the cable 87 to vary the tension of the spring 86.This construction exemplifies one in which the sand elevator receivessand from a pocket in the truck and to which it is delivered from thereservoir carried by the truck.

Shaft 61, which operates the wrist pin 61 to operate the conveyor bottom33 to feed sand to the screening device and carries the drivingsprockets 75 for the elevator chain 76, is driven from shaft 74 by apinion 100 which is keyed to said shaft and a gear-wheel 101 which isfixed to one end of shaft 61.'

Pinion 100 and gear 101 are disposed in a chamber 102 which is formed onone side of the housing 18 and has its outer side closed by a removableplate 103. This chamber is 'adapted to retain oi-l keep thegearingtherein efiiciently lubricated; The motor 90 and gearin driventherebyexemplify mechv anism by w ich the elevator, theendless-conveyorand the screening device may be driven from a motor mounted. on thetruck."

8 The mechanism for driving the traction ,*wheels to propel the truckcomprisesan 9160- v :tri'c motor. 114 which is mounted in .a'chamt her115 formed in housing 18; .arshaft 116 mounted in a bearing 117 in thehousing and coaxial with the motor 114; a .pinion 118 fixed to saidshaft; a gear 119, meshing with pinion 118 and mounted on a shaft 120; apinion 121 rigid with gear 119; agear-wheel 122 fixed to a shaft 123which is mounted in a bearing-124 carried by a horizontal wall 125 l ofthe housing 18; a wrist-pin 126 on one end of shaft 123 carrying a pawl127 and aratchet 128 loosely mounted on the tractionwheel axle 19. Aclutch-collar 129 is slidable on and splined to the traction-wheel axle19 and provided with clutch-teeth adapted to establish a drivingconnection between ratchet-wheel 128 and the axle, 19; This pawl andratchet are used to propel the truck slowly from place to place or whena mouldin machine is used in connection with the true from one flask toanother.

' For propelling the truck at high speed, as desired in moving themachine to and from its loading point or other places, a pinion v 130,fixed to rotate with gear 122 and shaft 123 drives a gear 131, which isloosely mounted on the traction-wheel axle and is provided with clutchteeth 132 adapted for en agement with corresponding teeth on thec utchcollar 129, so that a. driving relation'may be established between thehigh speed gear 131 and axle 19. Motor 114 is of the reversible type, sothat the machine maybe propelled cat high speed in either directionthrough the gear 131. A controller 134jat' the front of housing 18 isfixed to a shaft 135, which is pivoted in the housing and carries, atits inner end, a fork136 which is adapted to shift the clutch-collar 129into engagement with either the ratchet 128 for slow forward propulsionor with the gear 131 for high speed propulsion, as well as to. shift itin a neutral position when the truck is to remain stationary. The outerend of shaft 116 is supported by a bearing bracket 117. Pinion 118 andgear 119 are mounted in a pocket -on the outside of a housing 18 whichis enclosed by a removable cap 138. The remainder of the gearing fordriving the traction wheels is arranged in a chamber 139 which isadapted to contain oil to keep all of the gearing well lubricated. Thelower part of this chamber is formed by a shell 140 which is removablysecured. to the housing 18. A

drain plug 141,is provided in the bottom of said shell. I v v Themachine may be propelled by motor 114 and the high speed gearing 130,131 to the point where th reservoir 30 will receive a load of sind.TVhen the reservoir has been filled, the machine can be'propelledthroughthe same gearing and the reversal of motor. 114 to the placewhere the sand is tobe discharged or-when a moulding machine "is used,to the stretch where the empty flasks have been placed in readiness forfilling.

Next, the operator will start the motor 90 which will operate the lowerelevator shaft 61 through pinion 94, gear 95, shaft 7 4, pinion 100, andgear 101. 1 This will, operate the wrist-pin 61 to operate the conveyorbottom 33' of the reservoir 30 to feed sand into the screening device63. Simultaneously, the

wrist-pins 73 will operate resilient rods or bars 73 which'have theirrear ends connected to cross-bars 69 to vibrate the screenin device andsift the sand delivered into it y the conveyor 33. The elevator 76, 77,will be simultaneously operated by sprockets 75 on shaft 61 and willdischarge sand into the discharge hopper 85. If it is desired to havethe truck move slowly during the discharging operation, lever 134 willbe shifted to cause the truck to be propelled by pawl 127. When all ofthe sand in the reservoir 30 has been used, motor 90 will be stopped tostop the conveyor belt 33, the screening device and the elevator, andcontroller lever 134 will be shifted to put gear 131 into drivingrelation with the axle 19, so that the entire machine may be quicklypropelled to the loading point and there re-loaded;

A characteristic of the machine is that it is comparatively narrow so itmay be operated over a narrow space or runway 1n the foundry, which isimportant where the economizingof space is necessary. This results frommaking the reservoir comparatively narrow and longitudinally elongatedand arranging the reservoir and elevator longitudinally of one another.The housing, forming part of the truck, is utilized to enclose all ofthe drivingmechanisms, so they can be kept well lubricated and protectedfrom sand. The use of beams and a tubular reach in the truck isadvantageous in constructing the truck so that it will properly may bemodified within-the scope of the aprestricted to the detailsset forth,since these pended claims, without departing from the spirit and scopeof the invention.

Having thus described the invention, what we claim as new and desire tosecure by Letters Patent, is:

1. In foundry a paratus of the character described and com ination of asupporting structure, an elongated sand reservoir mounted on thestructure and embodying a discharge opening in the bottom portion of oneof the end walls thereof, an endless conveyor 'belt positioned to formthe bottom of the reservoir and adapted, during drive, to discharge thesand through the aforesaid opening, a movably mounted gate associatedwith the opening and adapted to regulate the discharge of sand by thebelt, adjustable gatesupporting means including a flexible suspensionelement operative to support the gate so that it is free to moveVertically, an elevator mounted on the structure and adapted to receiveand elevate the sand discharged by the belt through the gate-controlledopening, and mechanism on the structure for driving conjointlv the beltand elevator.

2. In foundry apparatus of the character described combination of atruck, an elongated sand reservoir mounted on the truck and embodying adischarge opening in the bottom portion of one of the end walls thereof,an endless conveyor belt positioned to form the bottom of the reservoirand adapted, during drive, to discharge the sand through the aforesaidopening, a movably mounted gate associated with the opening and adaptedto regulate the discharge of the sand by the belt, adjustablegate-supporting means including a flexible suspension element operativeto support the gate so that it is free to move vertically, an elevatormounted on the truck and adapted to receive and elevate the sanddischarged by the belt through the gatecontrolled opening, and mechanismon the truck for driving conj ointly vator.

3. In foundry apparatus of the character described combination of atruck embodying at one end thereof a cast metal housing structure havingintegral means forming a central pocket, a reservoir mounted on theother end of the truck and adapted to contain a supply of sand, means todischarge the sand in regulated quantity from the reservoir into thepocket, an elevator mounted on the truck and arranged so that its lowerend operates in the pocket, agitators in the pocket for directing thesand from the discharge-means towards the elevator, and mechanismdisposed in the housing structure for conjointly driving the elevatorand agitators.

4. In foundry apparatus of the character described the combination of awheeled truck comprising a housing extending transversely across thetruck, a reservoir for contalmng a load of sand mounted on the truck, anelethe belt and elevator comprising a supporting-standard on the housingand having its lower end working in the housing, means for dischargingsand in regulated quantity from the reservoir to the elevator, a motormounted in and enclosed by the housing, said housing having chambers inits sides, gearing for driving the elevator from the motor includinggears in said chambers, and removable means closing the outside of saidchambers.

5. In foundry apparatus of the character described the combination of aportable truck comprising a housing extending transversely across thetruck, a reservoir for containin a load of sand mounted on the truck,means %or discharging sand in regulated quantity from the bottom of thereservoir, an endless elevator mounted on the truck andhaving its lowerend disposed in said housing, a transverse drive-shaft for the lower endof the elevator mounted in said housing, an electric motor carried bythe housing, gearing mounted in the housing for driving the transverseshaft, and a crank connection between one end of the drive-shaft andsaid discharge means for operating the latter.

6. In foundry apparatus of the character described the combination of aportable truck comprising a housing extending transversely across thetruck, a reservoir for containing a load of sand mounted on the truck,means for discharging sand in regulated quantity from the bottom of thereservoir, an endless elevator mounted on the truck and having its lowerend disposed in said housing, a transverse drive-shaft for the lower endof the elevator mounted in said housing, an electric motor carried bythe housing, gearing including an intermediate transverse shaft mountedin the housing, for driving the'elevator drive-shaft, and a crankconnection between one end of the drive-shaft and said discharge meansfor operating the latter.

7. The combination of a portable truck comprising a housing, a reservoirfor containin a load of sand mounted on the truck, an en less conveyorfor discharging sand in regulated quantity from the bottom of thereservoir, an endless elevator mounted on the truck and having its lowerend disposed in said housing, a drive-shaft for the lower end of theelevator mounted in said housing, an electric motor carried by thehousing, gearing in the, housing for driving the elevator driveshaft, acrank connection on one end of the drive-shaft, and a pawl and ratchetoperated by said connection for operating the con veyor.

8. In foundry apparatus of the character described combination of atruck, an elongated said reservoir mounted on the truck and embodying adischarge opening in the bottom portion of one of the end walls thereof,an endless conveyor belt positioned to form the bottom of the reservoirand adapted,

during drive, to discharge the sand through "the aforesaid opening, agate adapted to regulate the discharge of sand through the opening andprovided with arms pivotally connected to the sides of the reservoir,adjustable gate-supporting means including a flexible suspension elementoperative to support the gate so that it is free to move vertically anelevator mounted on the truck and adapted to receive and elevate thesand discharged by the belt through the gate-controlled opening, andmechanism on the truck for driving conjointly the 'belt and elevator;

Signed at Chicago, Illinois, this 6th day of January, 1926.

* ELM'ER O. BEARDSLEY.

WALTER F. PIPER.

